Electric-welding apparatus



Feb. 15,1927. 1,618,080

E. V. GHBBONS ELECTRIC WELDING APPARATUS Filed July 24 1926 Patented Feb. 15, 1927.

PATENT OFFICE.

EUGENE V. GIBBONS, BOULDER, COLORADO.

v:ELECTR/IC-WELDIN'G APPARATUS.

Application filed July 24,

This invention relates to improvements in the construction of devices foruse in electric welding.

The practice of electrowelding metals is constantly increasing and is fast superseding other ways of acconmlishingl the same result, such as brazing, soldering and riveting.

The machines that have already been constructed for electrowelding are, as a rule, intended for large work and are expensive to buy and tooperate with the result that they are not adapted for small work where electrowel'ding is asessential as in connection with larger work.

It is the object of this invention to produce a simple welding device which can be operated with a comparatively small current and which shall be provided with a regulator by means of which the current may be controlled.

My improved welding device is intended primarily for use with small work although b v properly increasing the size ot the parts it may also be employed ior larger work.

My invention can be best described and will be most readily understood when reference is had to the accompanying drawing in which the present preferred construction has been illustrated and in which:

Fig. 1 is a diagrammatic representation of the several elements;

Fig. 2 is a longitudinal section through the handle portion, taken on line 2--2,

Fig. 3;

Fig. 3 is a transverse section taken on line 3-3, Fig. 2; and

. Fig. 4 is a perspective view of the assembled apparatus.

Alternating current is obtained from any convenient source such as a generator 5. A conductor 6 extends from the source to one electrode 7 of the welding device. The other electrode 8 is connected by means of 5 a conductor 9 to one end ot an inductive resistance or reactance coil 10. The other end of this coil is connected to the contact 11 of a single pole double throw switch whose sec- 1926. Serial No. 124,703. I

ond corresponding contact 12 is connected to the center point of the reactance coil by means of the conductor 13. The switch blade 14 is pivoted to the contact 15 so that it can be moved into electrical contact with either of the contacts 11 or 12. When the switch blade is in contact with 11 the cur- 55 rent flows through the whole of the coil 10 and when the blade makes connection with contact 12, only one-half of the coil is in se ries with the eletcrodes. It is evident that instead of using a double throw switch hav- 50 ing two contacts 11 and 12 only, a similar switch having a greater number of positions may be employed so that a liner adjustment can be made.

It is evident from Fig. 2 that if the elec- 55 trodes 7 and 8 are brought together, the circuit from the generator 5 will be closed, providingthe switch blade 14, contacts with either 11 or 12, and therefore an arc can be started by simply bringing the electrodes into contact and separating them. This arc can be used for welding in the usual way.

The electrodes 7 and 8 are secured by means of clamps 17 and screws 18 to the ends of the bars 19 an'd 20 of conducting ma- 75 terial. Bar 19 is secured by screws 21 to one side of a piece of insulating material 22. A second piece of insulating material 23 is secured to the part 22 by means of screws 24. The conductor 20 is secured to the part 22 80 by means of screws or rivets 25. A piece 26 also of insulating material, is secured to the conductor 20 by means` of screws 27. The end of conductor 6is contact with part 19 and conductor 9 is electrically connected 85 with part 20 through one of the rivets 25.

The parts 22, 23 and 26 form a handle by means of which the electrodes 7 and 8 'can a be manipulated. By the simple expedient of exerting a pressure on the parts 22 and 26, 90 the electrodes are moved towards each other, but are normally held separated in the manner shown in Fig. 2.

For convenience in transporting the apparatus, the parts are assembled in'a suitable 95 box or casing 28, provided with a handle 29.

The reactance coil is enclosed Within the box to each side, an electrode secured to the end 30. A removable cover, not shown, serves of euch of said bars, said electrodes being 10 to close the opening in the side of the box 2S. adapted to be moved into and out of con- Having now described the invent-ion what tact with each other and an insulating han- 5 is claimed as new is: n die portion secured to each of said conduc- An electric are Welder comprising, in comtors.

bination, a portion of insulating material, a Intestimony whereof I affix my signature.

resilient bar of conducting material secured EUGENE V. GIBBONS. 

